参数资料
型号: M306K9F8LRP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP144
封装: 16 X 16 MM, 0.40 MM PITCH, PLASTIC, TQFP-144
文件页数: 29/101页
文件大小: 2590K
代理商: M306K9F8LRP
CPU
Rev.1.00
Jun 06, 2003
page 16 of 290
M16C/6K9 Group
Bit 7: Stack pointer select flag (U flag)
Interrupt stack pointer (ISP) is selected when this flag is “0” ; user stack pointer (USP) is selected when this
flag is “1”.
This flag is cleared to “0” when a hardware interrupt is acknowledged or an INT instruction of software
interrupt No. 0 to 31 is executed.
Bits 8 to 11: Reserved area
Bits 12 to 14: Processor interrupt priority level (IPL)
Processor interrupt priority level (IPL) is configured with the three bits, for specification of up to eight proces-
sor interrupt priority levels from level 0 to level 7.
If a requested interrupt has priority greater than the processor interrupt priority level (IPL), the interrupt is
enabled.
Bit 15: Reserved area
The C, Z, S, and O flags are changed when instructions are executed. See the software manual for details.
Fig.BA-2 Flag register (FLG)
Carry flag
Debug flag
Zero flag
Sign flag
Register bank select flag
Overflow flag
Interrupt enable flag
Stack pointer select flag
Reserved area
Processor interrupt priority level (CPU)
Reserved area
Flag register (FLG)
C
D
Z
S
B
O
I
U
IPL
b0
b15
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